Here's a vid of a Line-following robot my friend and I made over the course of four months (one night a week). We built it at the United Greenworks Hackerspace in Grande Prairie, AB. Odd Cal is made up of mostly repurposed parts. The wheels, H-bridges, wiring, & Sensor bar all came from broken photocopiers. The chassis was from the electronic readout from a land-filled exercise bike and the RC servos were from past crashed RC planes. Odd Cal was entered into the Western Canadian Robot Games on May 15, 2010.